EP1882882A2 - Flowrate regulating device - Google Patents

Flowrate regulating device Download PDF

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Publication number
EP1882882A2
EP1882882A2 EP20070005099 EP07005099A EP1882882A2 EP 1882882 A2 EP1882882 A2 EP 1882882A2 EP 20070005099 EP20070005099 EP 20070005099 EP 07005099 A EP07005099 A EP 07005099A EP 1882882 A2 EP1882882 A2 EP 1882882A2
Authority
EP
European Patent Office
Prior art keywords
flow regulator
characterized
regulator according
volume flow
throttle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20070005099
Other languages
German (de)
French (fr)
Inventor
Johann Moses
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Karl Dungs GmbH and Co KG
Original Assignee
Karl Dungs GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE200610034917 priority Critical patent/DE102006034917B4/en
Application filed by Karl Dungs GmbH and Co KG filed Critical Karl Dungs GmbH and Co KG
Publication of EP1882882A2 publication Critical patent/EP1882882A2/en
Application status is Withdrawn legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23KFEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00Feeding or distributing other fuel to combustion apparatus
    • F23K5/002Gaseous fuel
    • F23K5/007Details
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N1/00Regulating fuel supply
    • F23N1/005Regulating fuel supply using electrical or electromechanical means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23KFEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2400/00Pretreatment and supply of gaseous fuel
    • F23K2401/20Supply line arrangements
    • F23K2401/201Control devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23KFEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2900/00Special features of, or arrangements for fuel supplies
    • F23K2900/05001Control or safety devices in gaseous or liquid fuel supply lines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N2021/00Pretreatment or prehandling
    • F23N2021/10Analysing fuel properties, e.g. density, calorific
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N2035/00Valves, nozzles or pumps
    • F23N2035/12Fuel valves
    • F23N2035/20Membrane valves

Abstract

The volumetric flow regulator (1) according to the invention consists of a fluid drive (12) for actuating a pressure control valve (10) and a downstream control throttle (11), at which the impending pressure drop is picked up and fed directly through unbalanced pressure tap channels (20, 21) to the fluid actuator (12). is directed. This has a membrane, one side of which is acted upon by the pressure before the control throttle (11) and the other side of the pressure behind the control throttle (11). Their deflection is thus determined by the pressure difference across the control throttle (11), are thus kept constant. As a result, a downstream gas consumer can be operated independently of other influences with a constant gas volume flow.

Description

  • The invention relates to a volumetric flow controller, in particular for heating burners.
  • Burners of heating systems must be supplied with defined gas flows or gas / air mixtures of defined composition. This is used, for example, according to the DE 103 40 045 A1 a ratio regulator, which picks up different pressures at a line leading to the burner or its gas nozzle and uses these to control a fluid actuator for a valve. The fluid actuator has for this purpose a membrane which divides two chambers in a drive housing. One of the chambers communicates with the ambient pressure. Thus, the ratio pressure regulator forms a gas flow depending on the ambient air pressure.
  • Especially with burners with low pressure drops and in small-sized fittings, the gas flow at full load is increasingly independent of the pressure set on the output side gas pressure. As a result, the set gas flow is occasionally not constant or tends to vibrate. Larger sized fittings are expensive. Higher pressure drops on the burner require a higher gas inlet pressure, which in turn overwhelms the small valves.
  • On this basis, it is an object of the invention to provide an improved volume flow regulator. In particular, this should have improved control properties.
  • This object is achieved with the volume flow regulator according to the invention, which is particularly suitable for heating burners, but also for other applications. The volume flow regulator according to the invention has a controlled valve, which is provided with a fluid drive, for example, in the form of a diaphragm drive. Downstream of the controlled valve, a control throttle is arranged, on which a differential pressure tap is provided. This includes a first pressure tap upstream of the control throttle and a second pressure tap downstream thereof. About the Differenzdruckabgriff a differential pressure signal is passed to the fluid drive, which performs an adjusting movement according to the differential pressure signal. The regulation takes place in the sense that the controlled valve counteracts differential pressure changes. If the differential pressure becomes too great, the valve tends to close while it tends to open when the differential pressure at the variable throttle becomes too low.
  • By this measure, the controlled volume flow of the back pressure of the burner is completely independent. The determination of the size of the gas volume flow is effected by a gas pressure control based on the differential pressure at the control throttle. The controller keeps the pressure difference at the control throttle constant. As a result, the gas volume flow in the ideal case only depends on the setting position of the actuating choke. The amount of gas is then linearly dependent on the fine throttle cross-section. It can be set robustly and excellently reproducibly on the control choke. Fluctuations in the gas inlet pressure and combustion chamber repercussions have practically no influence on the gas volume flow. Due to the constantly low pressure gradient at the variable throttle, measuring points can be found in a simple way that deliver suitable pressure values over the entire working range.
  • The volumetric flow controller according to the invention is also suitable for the correction of the gas / air ratio, wherein in the most favorable case the control choke is set as a function of the gas type or on the basis of a λ signal.
  • The control choke can be formed by an adjustably arranged slide a throttle a shutter interchangeable diaphragms or similar throttle arrangements. It can also be combined with the controlled valve in a common housing, so that the volume flow controller is formed by an individually manageable and salable assembly.
  • The differential pressure tap preferably includes a first tap channel upstream and a second tap channel downstream of the throttle of the actuating throttle. This tap channels can be formed by separate lines, housing bores, tubes tubes or other outwardly fluid-tight means. They are preferably unbranched and connect the differential pressure tap directly to the fluid drive.
  • The fluid drive is preferably a diaphragm actuator with a diaphragm which separates two working chambers from each other in a drive housing. Neither of the two working chambers has any connection to the atmosphere. Rather, one of the two working chambers is connected to the upstream tap channel, while the other working chamber is connected to the downstream tap channel. Thus, the valve is operated solely on the basis of the pressure difference at the control throttle. As a means for setting a pressure value is used, for example. A spring means that generates a force which is opposite to the actuating force of the fluid drive. This spring means can be arranged within the fluid actuator or otherwise, for example in or on the valve. It can be configured or arranged as required adjustable or adjustable. For example, it can be supported with one end on the diaphragm of the actuator and with its other end to a screw adjustable via an abutment. However, in the preferred embodiment, the abutment is fixed, i. immovable trained.
  • The control throttle is preferably designed to be adjustable, wherein for adjustment in the simplest case, a manual adjustment can be provided. This can, for example, serve to adapt to different gas qualities or to otherwise set a connected burner.
  • Alternatively, an actuator, such as. An electric drive may be provided, with which the control choke, for example. For regulating λ values is adjusted as desired.
  • Further details of advantageous embodiments of the invention will become apparent from the drawings, the description or claims.
  • In the drawings, embodiments of the invention are illustrated. Show it:
  • Fig. 1
    the volumetric flow controller according to the invention in a gas fitting arrangement for supplying a burner him schematic representation and
    Fig. 2
    a gas valve assembly with a volumetric flow controller in a modified embodiment in a schematic representation.
  • Figure 1 illustrates a gas burner 1 with associated gas supply 2, to which a gas supply duct 3, e.g. heard in the form of a line. In this, a gas fitting 4 is arranged, which comprises a plurality of valves or valve or throttle devices in one or more individual housings. To the gas valve include, for example, one or two gas safety valves 5, 6, in addition to actuator 7, 8, which may be formed, for example, as a pull magnet. In addition, the gas fitting 4 is a volumetric flow controller 9, which serves to provide the burner 1 a defined gas flow, regardless of the back pressure of the burner 1. The volumetric flow controller 9 includes a controlled valve 10 and a control throttle 11, which are arranged in series one behind the other , This control throttle 11 is downstream of the valve 10, i. between this and the burner 1 is arranged. While the valve 10 is provided with a fluid actuator 12, for adjusting the free flow cross-section of the control throttle 11, for example, a hand-held device 13, e.g. in the form of a set screw. With this the position of a slider or a throttle valve can be adjusted. Other adjustable throttling devices are suitable for replacing the adjusting throttle 11.
  • The fluid drive 12 serves to drive the valve closure member of the valve 10, for example. In the form of a locking cone which is adjusted against an opening. The adjustment takes place via an adjusting rod 14, which is connected to a membrane 15. The membrane 15 divides in a housing 16 from two working chambers 17, 18, which are sealed to the outside. The working chambers 17, 18 are connected to a differential pressure tap 19, with which the pending at the control throttle 11 pressure drop is detected. To the differential pressure tap 19 include a first tap channel 120 and a second tap channel 21. The tap channel 20 passes The tap between the valve 10 and the control throttle 11 pending pressure in the working chamber 17. The tap channel 21 passes the pending between the control throttle 11 and the burner 1 pressure to the working chamber 18. Both tap channels 20, 21 can be arranged in close proximity to the control throttle 11 be. The pressurization of the working chamber 17 tends to close the valve 10. The pressurization of the working chamber 18 tends to open the valve 10th
  • The valve 10 is associated with a spring means 22 which specifies a desired value for the differential pressure at the control throttle 11. The spring means 22 is an adjustment 23, for example. Assigned in the form of a screw. The pressure control is effected because the prevailing between the working chambers 17, 18 pressure difference and the force generated therefrom on the diaphragm 15 with the force of the spring means 22 in accordance. The spring characteristic of the spring means 20 is preferably flat, so that small pressure changes cause a large adjusting movement.
  • The volume flow controller 9 described so far operates as follows:
  • In operation, at the inlet of the gas fitting, gas is at a given possibly fluctuating pressure. Open the gas safety valves 5, 6 gas flows through the valve 10 and the control throttle 11 to the burner 1. This results in the control throttle 11, a pressure drop, which is passed via the differential pressure tap 19 to the fluid drive 12. This causes the valve 10 now regulated such a pressure at the input of the control throttle 11 that the pressure drop across the control throttle 11 assumes a constant desired value. This applies regardless of the back pressure caused by the burner 1 and also independent of the gas pressure which abuts against the input of the gas fitting 4. This also applies regardless of the surrounding atmospheric pressure.
  • Thus, at the control throttle 11 of the desired gas flow rate is precisely predetermined and adjustable.
  • A modified embodiment of the volumetric flow controller is shown in FIG. The above description applies accordingly. However, instead of the manual control device 13, an engine control device 24 is provided, with which the control throttle 11 can be actuated. The actuation takes place, for example, by means of a control device 25 which is connected via a λ-probe 26, e.g. can detect the composition of the exhaust gas supplied by the burner 1. If necessary, the actuator 24 can also be controlled or regulated using other values.
  • The volumetric flow controller 1 according to the invention consists of a fluid drive 12 for actuating a pressure control valve 10 and a downstream control throttle 11, at which the applied pressure drop is picked up and passed directly through unbranched pressure tapper channels 20, 21 to the fluid actuator 12. This has a membrane au, one side of which is acted upon by the pressure in front of the control throttle 11 and the other side of the pressure behind the control throttle 11. Their deflection is thus determined by the pressure difference across the control throttle 11, are thus kept constant. As a result, a downstream gas consumer can be operated independently of other influences with a constant gas volume flow.
  • LIST OF REFERENCE NUMBERS
  • 1
    burner
    2
    gas supply
    3
    Gas supply channel
    4
    gas train
    5
    Gas safety valve
    6
    Gas safety valve
    7
    actuator
    8th
    actuator
    9
    Volume flow controller
    10
    Valve
    11
    adjusting throttle
    12
    fluid drive
    13
    Hand adjusting device
    14
    control rod
    15
    membrane
    16
    casing
    17
    working chamber
    18
    working chamber
    19
    Differenzdruckabgriff
    20
    Abgriffkanal
    21
    Abgriffkanal
    22
    spring means
    23
    adjustment
    24
    actuator

Claims (16)

  1. Volume flow regulator (9), in particular for heating burners,
    with a controlled valve (10) provided with a fluid drive (12),
    with an actuating throttle (11) which is arranged downstream of the controlled valve (10) and provided with a differential pressure tap (19) which serves to control the fluid drive (12).
  2. Volumetric flow regulator according to claim 1, characterized in that the adjusting throttle (11) has an adjustably arranged slide.
  3. Volume flow regulator according to claim 1, characterized in that the differential pressure tap (19) comprises a first tap channel (20) upstream and a second tap channel (21) downstream of a throttle point of the actuating throttle (11).
  4. Volume flow regulator according to claim 1, characterized in that the fluid drive (12) is a diaphragm actuator with a diaphragm (15) in a housing (16) two working chambers (17, 18) separated from each other.
  5. Volume flow regulator according to claim 3 and 4, characterized in that the first tap channel (20) with only one of the working chambers (17) and the second tap channel (21) only with the other of the working chambers (18) is connected.
  6. Volume flow regulator according to claim 5, characterized in that the first tap channel (20) with that working chamber (17) is connected, the pressurization of which moves the valve in the opening direction.
  7. Volume flow regulator according to claim 5, characterized in that the second tap channel (21) with that working chamber (18) is connected, the pressurization of which moves the valve in the closing direction.
  8. Volumetric flow regulator according to claim 5, characterized in that the two tap channels (20, 21) are directly connected to the working chambers (17, 18) of the fluid drive (12).
  9. Volumetric flow regulator according to claim 1, characterized in that the adjusting throttle (11) is adjustable.
  10. Volume flow regulator according to claim 1, characterized in that the valve (10) in the closed position allows a minimum gas flow.
  11. Volume flow regulator according to claim 1, characterized in that the valve (10) is open in the rest position.
  12. Volume flow regulator according to claim 1, characterized in that the fluid drive (12) is closed against the environment.
  13. Volumetric flow regulator according to claim 1, characterized in that the fluid drive (12) has a spring means (22) to specify a pressure difference setpoint.
  14. Volume flow regulator according to claim 13, characterized in that the spring means (22) is arranged adjustable or formed.
  15. Volumetric flow regulator according to claim 1, characterized in that the control throttle (11) is manually operable.
  16. Volumetric flow regulator according to claim 1, characterized in that the actuating throttle (11) is connected to a drive device.
EP20070005099 2006-07-28 2007-03-13 Flowrate regulating device Withdrawn EP1882882A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE200610034917 DE102006034917B4 (en) 2006-07-28 2006-07-28 Volume flow controller

Publications (1)

Publication Number Publication Date
EP1882882A2 true EP1882882A2 (en) 2008-01-30

Family

ID=38623985

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070005099 Withdrawn EP1882882A2 (en) 2006-07-28 2007-03-13 Flowrate regulating device

Country Status (2)

Country Link
EP (1) EP1882882A2 (en)
DE (1) DE102006034917B4 (en)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102692020A (en) * 2012-04-27 2012-09-26 成都炭素有限责任公司 Adjustable gas flow combustion apparatus
US8839815B2 (en) 2011-12-15 2014-09-23 Honeywell International Inc. Gas valve with electronic cycle counter
US8899264B2 (en) 2011-12-15 2014-12-02 Honeywell International Inc. Gas valve with electronic proof of closure system
US8905063B2 (en) 2011-12-15 2014-12-09 Honeywell International Inc. Gas valve with fuel rate monitor
US8947242B2 (en) 2011-12-15 2015-02-03 Honeywell International Inc. Gas valve with valve leakage test
US9074770B2 (en) 2011-12-15 2015-07-07 Honeywell International Inc. Gas valve with electronic valve proving system
US9234661B2 (en) 2012-09-15 2016-01-12 Honeywell International Inc. Burner control system
US9557059B2 (en) 2011-12-15 2017-01-31 Honeywell International Inc Gas valve with communication link
US9645584B2 (en) 2014-09-17 2017-05-09 Honeywell International Inc. Gas valve with electronic health monitoring
US9683674B2 (en) 2013-10-29 2017-06-20 Honeywell Technologies Sarl Regulating device
US9835265B2 (en) 2011-12-15 2017-12-05 Honeywell International Inc. Valve with actuator diagnostics
US9841122B2 (en) 2014-09-09 2017-12-12 Honeywell International Inc. Gas valve with electronic valve proving system
US9846440B2 (en) 2011-12-15 2017-12-19 Honeywell International Inc. Valve controller configured to estimate fuel comsumption
US9851103B2 (en) 2011-12-15 2017-12-26 Honeywell International Inc. Gas valve with overpressure diagnostics
US20180058689A1 (en) * 2016-08-31 2018-03-01 Honeywell International Inc. Air/gas admittance device for a combustion appliance
US9995486B2 (en) 2011-12-15 2018-06-12 Honeywell International Inc. Gas valve with high/low gas pressure detection
US10024439B2 (en) 2013-12-16 2018-07-17 Honeywell International Inc. Valve over-travel mechanism
US10422531B2 (en) 2012-09-15 2019-09-24 Honeywell International Inc. System and approach for controlling a combustion chamber

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3405835A1 (en) * 1984-02-17 1985-08-22 Mpe Produkt Plan Ag Volume flow regulator
DE10340045A1 (en) * 2003-08-28 2005-03-24 Karl Dungs Gmbh & Co. Kg Ratio controller with dynamic ratio formation

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9835265B2 (en) 2011-12-15 2017-12-05 Honeywell International Inc. Valve with actuator diagnostics
US8839815B2 (en) 2011-12-15 2014-09-23 Honeywell International Inc. Gas valve with electronic cycle counter
US8899264B2 (en) 2011-12-15 2014-12-02 Honeywell International Inc. Gas valve with electronic proof of closure system
US8905063B2 (en) 2011-12-15 2014-12-09 Honeywell International Inc. Gas valve with fuel rate monitor
US8947242B2 (en) 2011-12-15 2015-02-03 Honeywell International Inc. Gas valve with valve leakage test
US9074770B2 (en) 2011-12-15 2015-07-07 Honeywell International Inc. Gas valve with electronic valve proving system
US9995486B2 (en) 2011-12-15 2018-06-12 Honeywell International Inc. Gas valve with high/low gas pressure detection
US9557059B2 (en) 2011-12-15 2017-01-31 Honeywell International Inc Gas valve with communication link
US9851103B2 (en) 2011-12-15 2017-12-26 Honeywell International Inc. Gas valve with overpressure diagnostics
US9846440B2 (en) 2011-12-15 2017-12-19 Honeywell International Inc. Valve controller configured to estimate fuel comsumption
CN102692020A (en) * 2012-04-27 2012-09-26 成都炭素有限责任公司 Adjustable gas flow combustion apparatus
US9657946B2 (en) 2012-09-15 2017-05-23 Honeywell International Inc. Burner control system
US10422531B2 (en) 2012-09-15 2019-09-24 Honeywell International Inc. System and approach for controlling a combustion chamber
US9234661B2 (en) 2012-09-15 2016-01-12 Honeywell International Inc. Burner control system
US9683674B2 (en) 2013-10-29 2017-06-20 Honeywell Technologies Sarl Regulating device
US10215291B2 (en) 2013-10-29 2019-02-26 Honeywell International Inc. Regulating device
US10024439B2 (en) 2013-12-16 2018-07-17 Honeywell International Inc. Valve over-travel mechanism
US9841122B2 (en) 2014-09-09 2017-12-12 Honeywell International Inc. Gas valve with electronic valve proving system
US9645584B2 (en) 2014-09-17 2017-05-09 Honeywell International Inc. Gas valve with electronic health monitoring
US10203049B2 (en) 2014-09-17 2019-02-12 Honeywell International Inc. Gas valve with electronic health monitoring
US10274195B2 (en) * 2016-08-31 2019-04-30 Honeywell International Inc. Air/gas admittance device for a combustion appliance
US20180058689A1 (en) * 2016-08-31 2018-03-01 Honeywell International Inc. Air/gas admittance device for a combustion appliance

Also Published As

Publication number Publication date
DE102006034917B4 (en) 2010-07-29
DE102006034917A1 (en) 2008-01-31

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